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If it feels like everyone around you is getting sick — you're not alone.
The big picture: The U.S. is seeing a massive surge in flu cases this winter, many of them attributed to the so-called super flu.
Zoom in: In Iowa, influenza activity was considered high for the week of Dec. 21-Dec. 27, according to the CDC.
What to watch for: Common colds often begin very slowly and emerge over several days, per the Mayo Clinic.